Appetitively motivated tasks in the IntelliCage reveal a higher motivational cost of spatial learning in male than female mice
Open access
Date
2024-02-29Type
- Journal Article
ETH Bibliography
yes
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Abstract
The IntelliCage (IC) permits the assessment of the behavior and learning abilities of mice in a social home cage context. To overcome water deprivation as an aversive driver of learning, we developed protocols in which spatial learning is motivated appetitively by the preference of mice for sweetened over plain water. While plain water is available at all times, only correct task responses give access to sweetened water rewards. Under these conditions, C57BL/6J mice successfully mastered a corner preference task with the reversal and also learned a more difficult time-place task with reversal. However, the rate of responding to sweetened water decreased strongly with increasing task difficulty, indicating that learning challenges and reduced success in obtaining rewards decreased the motivation of the animals to seek sweetened water. While C57BL/6J mice of both sexes showed similar initial taste preferences and learned similarly well in simple learning tasks, the rate of responding to sweetened water and performance dropped more rapidly in male than in female mice in response to increasing learning challenges. Taken together, our data indicate that male mice can have a disadvantage relative to females in mastering difficult, appetitively motivated learning tasks, likely due to sex differences in value-based decision-making. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000665561Publication status
publishedExternal links
Journal / series
Frontiers in Behavioral NeuroscienceVolume
Pages / Article No.
Publisher
Frontiers MediaSubject
IntelliCage automated system; appetitive learning; 3R refinement; C57BL/6J mice; sex differences; animal welfareMore
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ETH Bibliography
yes
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